>>>>> "Mike" == Mike Snitzer <snitzer@xxxxxxxxxx> writes: Mike> If that is the case then the data "start" should be different for Mike> these individual PVs (one following the other). If not, can you Mike> provide the 'dmsetup table' output for the associated DM devices? Did some more runs. It turns out the old stacking algorithm identified the two alignments as being incompatible for the wrong reasons. That's why a message was printed with the older kernel. I do find it a bit strange that you pass relative offsets to the stacking function and rely on the userland utilities to do the right thing, though. Doesn't that mean that existing misaligned volumes will go undetected? Or do you perform a check when you prepare the table before feeding it to the kernel? >> Note that this was run using an old EL5 LVM toolkit because I'm not >> interested in having userland compensate for any misalignment. Mike> OK, strikes me as odd but you must have your reasons I'm testing the stacking function. I'm not interested in things being lined up. -- Martin K. Petersen Oracle Linux Engineering -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel